Tsuguhito Yuta

A bit of an opportunist and a lady's man in the classroom, he is revealed to be intensely ashamed of his immense chubbiness back in his grade school years, and goes through great lengths to conceal this fact. He places great emphasis on his own appearance and prefers the company of similarly attractive people, acknowledging these facts even, yet at the same time is shown in several instances to be able to look past people's superficial features; as a result of this, he can be surprisingly intuitive at times. Yuta speaks his mind with a candid tongue (such as when he told Honoka Maki that she had a "terrible personality"), and possesses a kind heart underneath the rest of his personality.

~!After the incident in episode 12, he is shown eating with Honoka. She only eats one bite and offers it to him. He gladly accepts because of an "indirect kiss" but he questions why she would do that. Honoka says that she wants Yuta to get fat so people will stop chasing him for his good looks. Yuta's whole face turns red and Honoka starts walking away with Yuta chasing after her. !~

(Source: Kiznaiver Wikia)